Adjustable school-chair.



Nn. 665,47I. Patented lan. 8,- |901.

' M SAUDEB, Decd. lE.. L. SAUBER, Adminsrarix. ADJUSTABLE'SCHOOL CHAIR.

(Applicatin med Apr. 1v, 1900.)

(No uml.)

W/TNE SES.' XW. a.

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UN ITE STATES EXPERIENCE L. SAUDER, OF PHILADELPHIA, PENNSYLVANIA, ADMINISTRA- TRIX OF JOI-IN M. SAUDER, DEOEASED, ASSIGNOR TO THE J. M. SAUDER COMPANY, OF MARIETTA, PENNSYLVANIA.

ADJ USTABLE SCHOOL-CHAI R.

SPECIFICATION forming part of Letters Patent No. 665,471, dated January 8, 190,1.

Application filed April 17, 1900.

To @ZZ whom it may concern:

Be it known that JOHN M. SAUBER, deceased, late a citizen of the United States, whose residence was in the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, invented a new and useful Improvement in Adjustable School-Ch airs, of which the following is a full and complete specification.

The object of the invention is to provide an improved adjustable chair for use in connection with school-desks and which shall be distinguished by simplicity, cheapness, strength, and adaptation for easy, rapid, and securev adjnstment to accommodate pupils of different heights.

The features of construction are as hereinafter described, and more specifically indicated in the claims.

In the accompanying drawings, Figure l is a side view of the improved chair. Fig. 2 is an enlarged longitudinal section of the chairstandard, including a fixed pedestal and slidable seat-post. Fig. 3 is an enlarged crosssection on the line 3 3 of Fig. 3. Fig. 4 is an enlarged cross-section on the line 4 4 of Fig. 2. The hollow post l, which is secured to the bottom of the chair-seat 2, is adapted to fit and slide in the socket or hollow pedestal 3,

3o which is screwed to the floor. Both the said post l and pedestal 3 are preferably inclined backward at a slight angle, as shown. The post l has two lengthwise grooves 4, arranged on opposite sides, Fig. 5. The passage or socket in the pedestal 3, which receives the seat-post 1, is made sufficiently larger than the latter to allow considerable lateral play. At opposite points the pedestal 3 is provided interiorly with two lengthwise ribs 5 and 6.

4o The rib 5 is thickest andY projects farthest inward at the top, being tapered thence downward. The rib `6 is thickest or highest at the middle of its length, being tapered thence in both directions. It is thus practically convex. The ribs 5 6 fit loosely in the grooves 4 of the seat-post l, and thus guide the latter as it is slid down or up and prevent it being rotated on its axis. It will be observed that the ribs bear on the seat-post l at diagonally Serial llo-13,283. (No model.)

opposite points, the tapered rib 5 having con- 5o tact at the top only and the convex rib 6 at a lower point. A clamp-screw 7 is employed to secure the seat-post l at any desired height. This screw works through the side of the pedestal 3 and is provided with a circular head having radial nicks that adapt it forapplication of aspecial form of wrench. The location of the screw is an important feature, it being opposite the convex rib 6 and below the highest point of the same. It will be seen that by this arrangement when the screw 7 is adjusted to bear on the seat-post l, as in Fig. 2, the said post is thereby canted slightly backward and has such friction or biting action with the highest or most prominent portions of the ribs 5 6 and with the screw 7 that it is locked very securely by a comparatively easy pressure of said screw. There is hence no danger of the seat-post 1 sliding downward under the pressures which may be ordinarily applied to it, and the screw may be rotated and loosened by the application of slight force when it is desired to adjust the seat 2 higher or lower.

It is apparent that the convex rib Gis sloped or tapered upward to facilitate sliding the seatpost l into the pedestal and that mere projections in place of extended ribs would coperates with the screw, as above described.

What is claimed isl. An adjustable support comprising a hollow pedestal having interior projections, a seat-post adapted to slide therein, and having guide-grooves to receive said projections, and a clamp-screw which is arranged below the highest point of the lower projection and on the side of the pedestal opposite the same, substantially as shown and described.

2. An adjustable seat-support comprising a hollow-pedestal having interior ribs or projections, one of which is located near the top of said pedestal and the other diagonally opposite, and a clamp-screw arranged directly below the upper rib and at a lower point than the second or lower rib, whereby the post is held by friction and pressure at three points and is canted as shown and described.

3. An adjustable seat-support comprising socket, the convexity of one of them being lo# cated in a lower plane than the highest point of the opposite projection, substantially as shown and described.

EXPERIENCE L. SAUBER, Admz'm'stratrx of the estate of John M. Sauder, deceased.

Witnesses: l

GEORGE W. HALL, L. FRESCOLN. 

